1. SL Periodicity

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08-09 Jan
Group VII Lab; two main ideas - halogens are non polar molecules so are soluble in non polar solvents (like heptane); halides are ionic substances so are soluble in polar solvents; "like dissolves like" concept. Halogens will react with (oxidise) halide ions that are below them as you move down the group - e.g. chlorine will react with sodium BROMIDE but bromine will NOT react with sodium CHLORIDE. HW in your lab notebooks, ensure you have written a short paragraph about the coin & silver test tube experiment AND ensure you have created a table for your results from this experiment - you must follow the instructions pasted into your lab notebooks!!

Lab answers attached here: Group VII
hey Zein check out number 4!!!
The Chemistry of Group VII Elements Ans.pdf
10 Jan
 Day two group: completion of the lab on Elements and Compounds of the Third Period. Lab note books need to be updated (2 fun labs before break; group VII and this one). We'll go over the patterns next class.
11-12 Jan
 Go over post-lab for Elements and Compounds of the Third Period. How do we 'comment' or 'state' patterns that we see in experimental data? Use provided charts (6 pages of A3) to work in pairs writing and observing trends (patterns) as we go across the third period of the periodic table. HL must know all these details, SL only some (see your topic checklist). HL strongly encouraged to type up your own table of information from the chart paper and you may like to include the extra details provided on the exemplar up in the classroom. Flashcards are your best hope of memorising the equations. Reference: Companion text p58-59

Lab answers attached here: Elements and Compounds of the Third Period
Elements and Compounds of the Third Period AnsWiki.pdf
15-19 Jan

EXAM WEEK IS OVER - OVERALL WELL DONE.


We will have a brief review session on Saturday afterschool where the teacher brings homemade brownie -

who said chemistry wasn't fun?
22 -23 Jan
 Trends (just a fancy way to say patterns) in ionisation energies, electronegativities, atomic radii, ionic radii down groups (1 and 7) and across period 3.
HW: work to complete the worksheets given in class. The trick here is to EXPLAIN the reasons WHY clearly.

Housekeeping agenda:(if you missed anything)
  • Exam averages across the classes: HL 5 and SL 4 (2% off a 5)
  • Random PINs were given out
  • Lab notebooks are due this week - coin and silver 'labs' & group VII and Trends in Period 3 (see above) should be written up.
  • Oxides charts should be filed neatly/redone using tables in word etc - whatever it takes to know it.
  • Option C - we discussed the intent of having you do learning by research and your responsibility to seek out clarification of anything that didn't make sense whilst researching. In the 4 months leading up to the open book test there was ample time.
  • Which option next - seeking your input although the final decision remains mine - have a look through either the blue or green texts and see if anything looks particularly interesting for you. Consider what you're aiming to do at university. The decision will be made this week.
  • I STRONGLY URGE YOU TO DO TEST CORRECTIONS - then please return your exam to me. I also need to have the quantitative test and option C test returned to your folder. You can check these out ANYTIME you want them but they must remain on file for your marks to be validated.

Attachments for class. HL look on the HL page for the extra work for you to do.
3.3.1 Group Trends Class Notes.docx

Left as a word document for you to add your own notes and save it - print it when you're done and file it in the right order in your folder.

3.2 Phys Props Class Notes.docx

Left as a word document for you to add your own notes and save it - print it when you're done and file it in the right order in your folder.
24-26 Jan
 Ms Watt out sick -work emailed included below:
      1. finish the notes you downloaded from the wiki about GROUP TRENDS (the one with the pictures).
      2. HL you also have to fill out the template on chlorides of the third period (on the wiki on the HL page)
      3. Make sure your lab note book is complete – due Wednesday
      4. Make sure your test corrections are done and all three assessment pieces are put into your folder (coloured folders with your names up on my front desk)
      5. IF THIS IS ALL DONE – go to the physical properties notes also on the SL wiki page and read, think, digest and know them.
29-30
Jan
 Class notes:
  • clarification trends, periodicity & our emphasis is on group 1 (alkali metals) and group 7 (halogens) and period 3 (Na-Cl)
  • importance of using electron configurations to compare the SIZE of the particles we are dealing with when explaining trends in ionisation energies, electronegativities, atomic and ionic radii and melting points.
  • importance of evaluating the strength of the attractive force between protons in the nucleus and outermost (valence) e-
    • a strong attraction = smaller atoms/ions compared to a weak attraction = larger atoms/ions
    • as an example of explaining a trend - if atoms or ions are getting SMALLER then:
      • ionisation energy will increase, it'll be harder to remove an electron from the attraction of the protons in the nucleus;
      • electronegativity will increase, it'll be easier to attract the shared electrons in a covalent bond because the attraction of the protons in the nucleus will be greater
      • melting point will increase, the particles in the solid will be closer so attraction between particles will be stronger which will require more energy to overcome in order to melt the solid. (There are exceptions to this idea that we will see in the bonding unit.)
[Make an effort to be very clear on the definitions of each of these properties BEFORE you try to explain them.]

HW: complete all the ionisation work sheet.
Quiz coming: Tuesday/Wednesday - a few questions, timed, on ionisation energy only. You will be EXPLAINING.

Remember: from now on everything counts for grade!! Yahoo!! Rock on! Oh yeah baby!!!
31 Jan 1 Feb
 Lab: Colours and oxidation states of transition metal elements. Out of sequence due to the visit of the K1 kids.
Carry out the experiment, record your observations on the sheet provided (I have your lab note books) and HL we will do the theory for this next week. SL do the lab just for practice and note colours of ions in solution.
2 Feb 5 Feb
 Going over group and period trends for atomic and ionic radii/electronegativity. Answers available in class. Questions - ask away. Quiz coming: Tuesday/Wednesday 8/9 Feb.
6 Feb
9 Feb
 SL content finished. Practice practice practice - Green Text Ex. 3.1 p 72; Ex 3.2 p 75; Ex 3.3 p 80 check your answers (you have them on your lap top!) - completing all of these while HL continue will seriously enhance your chances of real understanding - remember class time is not homework time/night time/your time - so use it well.
Set:
6 Feb
 PERIODICITY TOPIC TEST - 60 MINUTES - 22/23 FEBRUARY. Timed to allow you the TIME to get some practice in. Grades are going to be emailed to parents.